Hydraulic weighing unit



Dec. 2, 1941. P. B. KELLY HYDRAULIC WEIGHING UNITS Filed Feb. 15, 1940Patented Dec. 2, 1941 UNITED STATES PATENT OFFICE HYDRAULIC WEIGHINGUNIT Paul B. Kelly, Prineville, Oreg.

Application February 15, 1940, Serial No. 319,164

3 Claims. (Cl. 265-47) This invention relates to a hydraulic weighingunit, and it is a particular object of the invention to provide a unitof this kind for use in connection with vehicles and to provide meanswhereby the weight may be readily checked at any time during a loadingoperation.

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improvedhydraulic weighing unit whereby certain important advantages areattained and the device rendered simpler, less expensive and otherwisemore convenient and advantageous for use, as will be hereinafter morefully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to describe the same with reference to the accompanying drawing,wherein:

Figure 1 is a view in top plan with portions broken away of a weighingunit constructed in accordance with an embodiment of my invention;

Figure 2 is a longitudinal sectional view taken substantially on theline 22 of Figure 1 with certain of the parts in elevation;

Figure 3 is a transverse sectional view taken substantially on the line3--3 of Figure 1;

Figure 4 is a detailed sectional view taken substantially on the line4-4 of Figure 1.

As disclosed in the accompanying drawing, B denotes an elongated bottomor base plate of desired width and which has suitably mounted upon itscentral portion the longitudinally spaced upstanding cylinders C inwhich extend for up and down movement the plungers or rams P. Incommunication with and leading from the lower portions of the cylindersC are the flexible pipe lines I which lead to and coact in aconventional manner with the hydraulic gauges G carried by and extendingthrough a side wall 2 of a central upstanding housing H provided at thecentral portion of a top plate T. This plate T is of a lengthsubstantially coextensive with the length of the bottom or base plate Band the opposite end por tions of this plate T serve to provideplatforms 3 upon which are adapted to be positioned the wheels,diagrammatically indicated at W in Figure 1, of the vehicle of which theload is to be measured.

The platforms 3 are normally spaced above the adjacent end portions ofthe bottom or base plate B and the hydraulic pressure created by theforcing of the plungers or rams P into the cylinders C under the actionof the weight upon the platforms 3 will result in such weight beingregistered by the gauges G and in determining such weight the registerof both of the gauges G is added.

To one side of the longitudinal center of the top plate T the housing His intersected by the transversely disposed rod 4 Operatively engagedwith and supported, as at 5, by the side walls 2. Pivotally engaged withthis rod 4 are extremities of a substantially H-shaped link 6, theopposite extremities of which are pivotally engaged with a rod 1bridging the space between and supported by the transversely spacedupstanding lugs 8 carried by the bottom or base plate B. The rods 4 andl are positioned at opposite sides of the longitudinal center betweenthe cylinders C and are equi-distantly spaced from said longitudinalcenter.

The connection of the top plate T with the bottom or base plate B issuch as to compensate for variations in weight upon the platforms 3 ofthe plate T.

The side marginal portions of each of the platforms 3 have pivotallyconnected therewith, as at 9, the inner end portions of the approachplates I0. These plates l0 provide means to facilitate the travel of thevehicle up upon the platform 3. Operatively engaged, as at l I, with theouter end portions of the plates at each end of the top plate T are thechains or flexible members l2 which have their outer extremitiessuitably coupled, as at l4. These coupled chains l2 provide means tofacilitate the handling of the unit and which unit is readily portable.

It is believed to be obvious from the foregoing that the unit hereindisclosed, is of a type whereby the weight of the load can be readilychecked during the loading operation.

From the foregoing description it is thought to be obvious that ahydraulic weighing unit constructed in accordance with my invention isparticularly well adapted for use by reason of the convenience andfacility with which it may be assembled and operated, and it will alsobe obvious that my invention is susceptible of some change andmodification without departing from the principles and spirit thereofand for this reason I do not wish to be understood as limiting myself tothe precise arrangement and formation of the several parts herein shownin carrying out my invention in practice except as hereinafter claimed.

I claim:

1. A weighing unit of the class described comprising a base plate, asuperimposed top plate, the central portion of the top plateconstituting an upstanding housing, and the end portions of the topplate constituting platforms, longitudinally spaced hydraulic cylinderscarried by the base plate, gauges carried by the housing of the topplate and in communication with the cylinders, rams working in thecylinders and operatively engaged with the top plate, a connecting linkinterposed between the cylinders, and means for pivotally connecting oneend portion of the link to the top plate and the opposite end portion ofthe link to the bottom plate.

2. A weighing unit of the class described comprising a base plate, asuperimposed top plate, the central portion of the top plateconstituting an upstanding housing, and the end portions of the topplate constitutin platforms, longitudinally spaced hydraulic cylinderscarried by the base plate, gauges carried by the housing of the topplate and in communication with the cylinders, rams working in thecylinders and operatively engaged with the top plate, a connecting linkinterposed between the cylinders, and means for pivotally connecting oneend portion of the link to the top plate and the opposite end portion ofthe link to the bottom plate, said pivotal means being substantiallyequi-distantly spaced from and at opposite sides of the longitudinalcenter between the spaced cylinders.

3. A weighing unit for vehicles comprising an elongated base plate, atop plate superimposed thereon and of a length substantiallyco-extensive in length with the base plate, the central portion of thetop plate constituting an upwardly disposed housing, the extremities ofthe top plate constituting platforms upon which the wheels of a vehicleare to be positioned, gauges carried by the opposite end portions of thehousing and readable from without the housing, and hydraulic meanswithin the housing at each end portion thereof and in operativeconnection with one of the gauges, each of said hydraulic meansfunctioning upon depression of the top plate for op erating the gaugeassociated therewith.

PAUL B. KELLY,

